1.3 Old Entry

Unbox the loop in the original entry, and crank up gcc.

I don't get a speed difference between the two versions with GHC-6.4.1 and gcc-4.0.3 on Debian/x86.
~Lemmih

In response: On OpenBSD/x86 it's more than twice as fast. However, the
speedup is much less on Linux/x86 with the same gcc (3.3.5). On Linux,
for N=1000000000, I have the old version as 1.2x slower than the unboxed
version. On OpenBSD the old version is 2.8x slower. -- Don